Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
  • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
  • F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
  • F16K11/048—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with valve seats positioned between movable valve members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0603—Multiple-way valves
  • F16K31/0624—Lift valves
  • F16K31/0634—Lift valves with fixed seats positioned between movable valve members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
  • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
  • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
  • F01L2001/34423—Details relating to the hydraulic feeding circuit
  • F01L2001/34426—Oil control valves
  • F01L2001/3443—Solenoid driven oil control valves
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8593—Systems
  • Y10T137/86493—Multi-way valve unit
  • Y10T137/86574—Supply and exhaust
  • Y10T137/86622—Motor-operated
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8593—Systems
  • Y10T137/86493—Multi-way valve unit
  • Y10T137/86574—Supply and exhaust
  • Y10T137/8667—Reciprocating valve
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8593—Systems
  • Y10T137/86493—Multi-way valve unit
  • Y10T137/86574—Supply and exhaust
  • Y10T137/8667—Reciprocating valve
  • Y10T137/86678—Combined disk or plug and gate or piston
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/8593—Systems
  • Y10T137/86493—Multi-way valve unit
  • Y10T137/86574—Supply and exhaust
  • Y10T137/8667—Reciprocating valve
  • Y10T137/86686—Plural disk or plug

Definitions

• the present invention relates to an electrically operated hydraulic control mechanism such as a solenoid valve.
• Solenoid control valves for hydraulic control systems are used to control oil under pressure that may be used to switch latch pins in switching lifters and lash adjusters in engine valve systems.
• Valve lifters are engine components that control the opening and closing of exhaust and intake valves in an engine.
• Lash adjusters may also be used to deactivate exhaust and intake valves in an engine.
• Engine valves may be selectively deactivated or locked out to disable operation of some cylinders in an engine when power demands on an engine are reduced. By deactivating cylinders, fuel efficiency of an engine may be improved.
• Valve response times include valve activation response times and deactivation response times.
• Solenoid control valves apply a magnetic force to an armature that moves a control valve stem by activating a coil to move the armature against a biasing force that is typically provided by a spring.
• the magnetic force applied by the solenoid to the armature and in turn to the control valve stem should be maximized to reduce response time.
• the magnetic force applied by the coil can be increased by increasing the size of the coil.
• cost and weight reduction considerations tend to limit the size of the coil.
• Deactivation response times are adversely impacted by valve closure biasing springs, the force of which must be overcome before the valve is opened. While this delay in response times in most applications is minimal, in variable valve actuation systems, the limited time window for valve activation and deactivation is critical and must be minimized.
• a hydraulic control valve having a solenoid body, an energizable coil, and an armature positioned adjacent the coil.
• a valve stem extends from the armature.
• the coil is energizable to move the armature and the valve stem from a first position to a second position.
• the first position may be a deenergized, closed position
• the second position may be an energized, open position.
• the valve body, the armature and the valve stem are configured so that the armature and the valve stem are biased to the first position by pressurized fluid, allowing the armature to operate without a biasing spring.
• the armature is configured so that the net fluid forces contribute to closing the valve, providing a relatively quick valve actuation response time.
• the armature and the valve stem include a first poppet and a second poppet, and the valve body defines a supply chamber with a first seat, a second seat, and a control chamber between the first and second seats.
• the first poppet is configured to sit at the first seat and the second poppet is configured to be spaced from the second seat in the first position to prevent pressurized fluid flow past the first seat and to exhaust fluid from the control chamber past the second seat.
• the first poppet is configured to be spaced from the first seat and the second poppet is configured to sit at the second seat in the second position to permit flow of pressurized fluid from the supply chamber to the control chamber and prevent flow from the control chamber to the exhaust chamber.
• the hydraulic control valve may be mounted to an engine such that the armature falls to the second position when the engine is off and the coil is not energized, thereby moving the first poppet off of the seat to open the supply chamber to the control chamber.
• the armature due to gravity, the armature is in the same position as the energized, engine -on position when the engine is off and the coil is not energized.
• air can thereby expel from the supply chamber to the control chamber, and further to the exhaust when the armature and valve stem move to the first position due to pressurized oil acting on the second poppet. Expelling any air in the system enables a quicker, more controlled response of the valve.
• a hydraulic control circuit is provided with an electromagnetic actuator selectively actuatable to create a flux path, a valve body having a seat past which a fluid under pressure is selectively permitted to flow, and an armature that is selectively moved in a first direction by electromagnetic flux.
• the armature defines a poppet that is moved in the first direction relative to the seat from a closed position in which fluid flow past the seat is prevented to an open position in which fluid flow past the seat is permitted, the armature being biased to the closed position by operation of the fluid under pressure.
• FIGURE 1 is a perspective view of a solenoid valve
• FIGURE 2 is an exploded perspective view of the solenoid valve shown in Fig. 1;
• FIGURE 3 is a cross-sectional view taken along the plane of section line
• FIGURE 4 is a partial cross-sectional view similar to Figure 3 of the valve in a second, open and energized position.
• a solenoid valve 10 for example, such as that used to deactivate lifters or operate a dual lift system in an internal combustion engine or diesel engine is illustrated.
• the solenoid valve 10 may also be referred to as an electromagnetic actuator.
• the solenoid valve 10 is installed in an engine 12.
• the solenoid valve 10 includes a solenoid portion 16 and a valve body 18.
• the solenoid valve 10 is shown to include a solenoid can 20 that houses a coil 22 that powers the solenoid valve 10.
• a pole piece 24 is assembled within the solenoid can 20.
• the pole piece 24 defines part of the flux path for the coil 22.
• a flux collector insert 26 is disposed within the solenoid can 20 and also forms part of the flux path for the coil 22.
• An air gap 30 is provided between a radially- extending face 31 of the pole piece 24 and a radially-extending face 33 of the armature 28.
• the air gap 30 may be adjusted by adjusting the pole piece 24 relative to the armature 28.
• a relief groove 34 shown in Fig. 2, is provided in the armature 28 that facilitates flow of oil under pressure axially across the armature 28.
• the relief groove 34 is also referred to as a conduit.
• a conduit may be formed in the valve body 18 adjacent the armature 28 to provide flow of pressurized oil across the armature 28.
• the flux collector insert 26 may be inserted adjacent to the coil 22 and the valve body 18 in a molded one-piece or multiple-piece body 40.
• the valve body 18 defines an oil intake chamber 41, also referred to as a supply chamber, in which the armature 28 is disposed and that initially receives oil under pressure.
• the valve body also defines an intermediate chamber 42, also referred to as a control chamber.
• a plurality of O-ring grooves 43 are provided on the exterior of the valve body 18 that each receives one of a plurality of seals 44.
• the seals 44 establish a seal between the valve portion 18 and the engine 12.
• the molded body 40 defines an internal coil receptacle 46, or bobbin, that extends into the solenoid portion 16.
• the coil 22 is shown only in part, but it is understood that the coil 22 fills the coil receptacle 46.
• the body 40 may be formed as a one-piece integral plastic molded part, as illustrated, or could be formed in pieces and assembled together. The coil 22 is wrapped around the coil receptacle 46.
• a valve stem 48 has a portion 50 that is received within an opening 52 in the armature 28.
• the position of the control valve stem 48 may be adjusted relative to the armature 28 by a threaded connection or by a press-fit between the stem 48 and the armature 28.
• the armature 28 includes a poppet 54 that is moved relative to the valve seat 56 in response to pressure changes, as will be more fully described below.
• An exhaust poppet 60 is provided on one end of the control valve stem 48 to move relative to a valve seat 62 to open and close an exhaust port 70.
• a supply gallery 64 is provided in the engine 12 to provide pressure Pi to the oil intake chamber 41 that is defined in the valve body 18.
• a control gallery 68 is provided in the engine 12 that is normally maintained at control pressure P2.
• An exhaust gallery 71 also provided in the engine, is in communication with the exhaust port 70 and is ported to ambient pressure and may be referred to as "Po".
• the intermediate chamber 42 goes to Pressure Po when the exhaust port 70 is opened.
• the coil 22 is energized to retract the armature 28 toward the coil 22.
• the poppet 54 opens the valve seat 56 to provide pressure Pi from the oil intake chamber 41 to the intermediate chamber 42, and the exhaust poppet 60 sits at seat 62 to close the exhaust port 70.
• the valve body 18 includes a supply opening 63 that receives oil under pressure from a supply gallery 64 that is in communication with the oil intake chamber 41 and the valve seat 56.
• a supply gallery 64 that is in communication with the oil intake chamber 41 and the valve seat 56.
• the intake chamber 41 is in communication with the intermediate chamber 42.
• Oil under pressure is provided through an outlet opening 66, also referred to as a control port, and to a control gallery 68.
• An exhaust port 70 is provided at the inboard end of the valve body 40. Exhaust port 70 is in communication with exhaust gallery 71.
• the valve 10 is normally closed as shown in Fig. 3 and is shifted to its open position as shown in Fig. 4 by energizing the coil 22.
• the coil 22 when energized, reduces the air gap 30 formed between the pole piece 24 and the armature 28.
• the armature 28 is shifted toward the pole piece 24 by electromagnetic flux created by the coil 22.
• Oil in chamber 41 is in communication with the gap 30 through the relief groove 34.
• the poppet 54 closes the valve seat 56, isolating the oil intake chamber 41, which is at Pi, from the intermediate chamber 42, which is at P2.
• the oil under pressure in the oil intake chamber 41 biases the poppet 54 against the valve seat 56.
• the area of the armature 28 affected by Pi biases the armature to the closed position as Pi acts on the larger surface area of face 33 of the armature 28 at the gap 30 to provide biasing force in one direction (i.e., in a direction to seat the poppet 54 at the seat 56, while pressurized fluid at Pi acts on a smaller surface area 73 of the armature in the chamber 41 in an opposing direction.
• the biasing force applied to the poppet 54 is intended to eliminate the need for a spring.
• a spring (not shown) may be incorporated to increase the biasing force applied to the poppet 54.
• Pi acts on the surface area of face 33 of the armature 28 and the surface area 72 of the poppet 54 in one direction and on annular surface area 73 and surface area 74 of poppet 54 in an opposing direction. Because the affected surface area 33 is equal to the combined surface areas 73 and 74, the net force is that on surface area 72.
• This change in pressure increases the hydraulic pressure supplied to the engine valve system to Pi.
• selected engine valves may be deactivated by latch pins, lash adjusters or another controlled device (not shown) to thereby deactivate selected cylinders of the engine.
• the armature 28 When the coil 22 is subsequently deenergized, with the forces due to the flux removed (i.e., the net force pulling the armature 28 toward the pole piece 24), the net fluid pressure on surface area 33 drives the armature 28 to the normally closed, deenergized position of Fig. 3.
• the armature 28 is configured so that the net fluid forces (i.e., net downward force acting on face 72) contributes to closing the valve 10, with the chamber 42 exhausting to exhaust port 70, thereby providing relatively quick valve actuation response time from the energized to the deenergized position.
• the valve 10 is provided with an air purging and self-cleaning feature.
• the armature 28 is formed with a bypass slot 53, also referred to as a bypass channel, to permit a limited amount of oil to move from chamber 41 to chamber 42 when the valve 10 is closed, bypassing the seat 54.
• the bypass slot may be provided in the body 18 adjacent the seat 54.
• the slot 53 also allows particles of dirt to be expelled from chamber 41 with the oil, and thus functions as a "self- cleaning" feature of the valve. Additionally, air is purged from the chamber 41 through slot 53, thus preventing an air cushion acting against valve 10 moving to the energized position of Figure 4 when the coil 22 is subsequently energized. This allows quick transitioning from the deenergized to the energized position.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Magnetically Actuated Valves (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=43243021

Family Applications (1)

Country Status (9)

Families Citing this family (21)

Family Cites Families (37)

• 2009
  • 2009-06-17 US US12/486,035 patent/US8316888B2/en not_active Expired - Fee Related
• 2010
  • 2010-06-16 KR KR20127001202A patent/KR20120038969A/ko not_active Abandoned
  • 2010-06-16 PL PL10742553T patent/PL2443372T3/pl unknown
  • 2010-06-16 JP JP2012515575A patent/JP5692543B2/ja not_active Expired - Fee Related
  • 2010-06-16 EP EP20100742553 patent/EP2443372B1/de not_active Not-in-force
  • 2010-06-16 WO PCT/IB2010/001455 patent/WO2010146447A2/en not_active Ceased
  • 2010-06-16 AU AU2010261455A patent/AU2010261455B2/en not_active Ceased
  • 2010-06-16 MX MX2012000011A patent/MX2012000011A/es unknown
  • 2010-06-17 CN CN201010263171.5A patent/CN101929363B/zh not_active Expired - Fee Related
  • 2010-06-17 CN CN2010205230859U patent/CN202117727U/zh not_active Expired - Fee Related
• 2012
  • 2012-11-26 US US13/685,125 patent/US9157542B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events